wire harness design required to connect automotive parts

Since the grease is present in the wire harness, the metal composite tape will be in contact with the grease for a long time, which requires consideration of the compatibility with the grease. The object of compatibility observation is whether the base tape and the polymer film in the grease will blister or stratify. Corrosion resistance means that the composite tape will not delaminate or corrode the base tape in an acidic or alkaline environment. For example, the base tape of a composite steel strip is usually made of a chrome-plated steel strip. The chrome-plated layer is characterized by being stable in a humid atmosphere and stable in a general acidic environment. This is because the metal chromium itself is easily oxidized into a very thin passivation layer in the atmosphere. Tests and long-term use have proven that chrome-plated steel strips are fairly stable and reliable in the in-line bundle design.

The connector library is the basis of programming. By setting up the connector library, it can be called directly during programming. It is necessary to define the connector every time the program is built. Especially for the same series of chassis, only need to be defined once to establish a modular programming framework. Other modules can directly call this module to improve the efficiency of programming. The test program is compiled in the system software. It is based on the standard wiring diagram (table) and the connection relationship between the chassis and the tester. The combination of self-learning and the input method is the main method of programming. It is very important to establish the connector library correctly. All the connectors of the tested chassis must be correctly and accurately written into the connector library. The definition, number, number of terminals, and model are clear and accurate, and the number and definition are unique.

In order to simplify the input process, first select the longer wire of the harness design as the main harness, and divide the nodes according to the branch points of the harness in turn, and the branch wires of the mainline are not connected from the nodes of the main harness node or the branch wire harness, and the surface is covered. Segmentation describes the manner in which each node is wrapped between the previous node, thus describing the main structure of the harness. The two ends of the loop are respectively connected to the plastic connector, the joint or the headless process from the node of the main harness node or the branch line, and no part is connected, which is collectively referred to as a terminal: or is simply matched with other circuits, thereby describing the starting and ending position of the loop. The length of the path between the exit points at both ends of the loop is the length of the loop. For the convenience of input, the access position of the circuit is usually specified in the form of adding terminals. Since the plastic connectors are already configured in the material database, each of the suitable connectors, sealing plugs and plugs (commonly known as hole accessories) are added, and plastic is added. When the connectors are connected, the circuit numbers of each accessor are respectively specified. The system automatically determines the type of the connector and the sealing plug to be crimped according to the cross-sectional area of the loop and the fitting range of the positional accessories and then inserts the plastic connector on the drawing. Tile files and text comments; adding connectors and headless processing is similar. The relationship between nodes, terminals, loops and other information, the data structure formed after inputting information is in one-to-one correspondence with the body, and the reference relationship between the data corresponds to the relationship in the figure. In addition, there are some positioning parts, binding parts and customer-required tape materials on the wire harness, which are also graphically added to the product information. In this way, the wire harness node is the main line, and the terminal is the end point of the loop, that is, the starting and ending points of the loop and the structural information of the harness design are completely described.

In order to make the model of the above design do not resonate during excitation, it is necessary to perform modal analysis on the above design to find the natural frequencies of the various stages of the model. Natural frequency, which is a disadvantage.